Module 2, Lesson 3

The total amount of ______________ on the right side of a chemical equation is always equal to the total mass on the left side of the equation.

• oxygen

• mass

• volume

Chemical reactions form __________

• explosions

• compounds

• celebrities

Acids have a

• low pH

• high pH

• bad attitude

The chemicals on the right side of an equation are referred to as the

• answer

• reactants

• products

A solid formed by the chemical reaction of some solutions is a

• chunk

• mixture

• precipitate

Which of the following indicate that a chemical reaction has occurred?

• the formation of gas bubbles

• a change in color

• an odor

• ALL OF THESE!

Which is a chemical change?

• melting ice

• boiling water

• a candle burning

• frost forming in a freezer

A combustion reaction usually results in heat and

• light

• an acid

• oxygen

• a base

When reactants form products, a(n) __________ has occurred.

• base

• chemical reaction

• acid

• mixture

What law states that the total mass of the reactants equals the total mass of the products in a chemical reaction?

• The law to wear seatbelts.

• The law of not running in the halls.

• The law of conservation.